tutorial() under gnome-3.12 does not show a tutorial but generates endless "fixme:exec:SHELL_execute

[jue...@gmail.com]

rose@impala:/home/rose(1)$ sage
┌────────────────────────────────────────────────────────────────────┐
│ Sage Version 6.2, Release Date: 2014-05-06                         │
│ Type "notebook()" for the browser-based notebook interface.        │
│ Type "help()" for help.                                            │
└────────────────────────────────────────────────────────────────────┘
sage: help()
Welcome to Sage 6.2!

To view the Sage tutorial in your web browser, type "tutorial()", and
...
sage: tutorial()
sage: fixme:exec:SHELL_execute flags ignored: 0x00000100
fixme:exec:SHELL_execute flags ignored: 0x00000100
fixme:exec:SHELL_execute flags ignored: 0x00000100
fixme:exec:SHELL_execute flags ignored: 0x00000100
fixme:exec:SHELL_execute flags ignored: 0x00000100
fixme:exec:SHELL_execute flags ignored: 0x00000100
fixme:exec:SHELL_execute flags ignored: 0x00000100
fixme:exec:SHELL_execute flags ignored: 0x00000100
fixme:exec:SHELL_execute flags ignored: 0x00000100
fixme:exec:SHELL_execute flags ignored: 0x00000100

[Dima Pasechnik]

and do you see the same if you try notebook() call?
That is:

sage: notebook()